KR20010040116A - Vehicular headlamp - Google Patents

Abstract

PURPOSE: To provide a headlight assembly for a vehicle including a moveable shade for regulating the distribution of the light that facilitates its assembling and adjustment of the position of the shade. CONSTITUTION: A headlight includes a moveable shade 22, and shade control device 24 for moving the shade 22 between two positions to regulate the light of the light-emitting part 18a of a discharge valve 18 incidents on the reflection surface 20a of a reflector 20. The moveable shade 22, shade control device 24, and discharge valve 18 are integrally assembled with a valve support base 26 as unit before being attached to the reflector 20. This facilitates the assembling of the headlight, and adjustment of the position of the shade 22.

Description

Headlights for Vehicles {VEHICULAR HEADLAMP}

The present invention relates to a vehicle headlamp configured to move a movable shade to change luminaire light distribution.

Vehicle headlights reflect light from the light source forward at the reflector to irradiate the low or high beam beams, but the light distribution valve having two light sources or two light sources is different because the light distribution pattern required for the low and high beams is different. It is common to perform the beam switching of a low beam and a high beam by performing the lighting switching using a light source valve.

However, vehicle headlamps are also known which are configured to perform beam switching with a single light source. In particular, in a two-lamp headlight using a discharge valve as a light source valve, such a configuration is often required.

As one of the beam switching methods in the case where a light source is single, the method of performing beam switching by moving a movable shade conventionally is known. In this method, the shade drive device is configured to move the movable shade between two positions where the shielding amount for the incident light from the light source to the reflector is different.

However, in the headlamps for vehicles provided with the conventional shade driving apparatus, it is necessary to attach the movable shade to the reflector while moving the shade driving apparatus to the reflector and to connect the movable shade and the shade driving apparatus. For this reason, there is a problem in that the luminaire assembly is poor, and it is not easy to increase the positional accuracy of the movable shade with respect to the light source.

This problem is a common problem not only when the movable shade is moved to perform beam switching between the low beam and the high beam, but also when the movable shade is changed to change the luminescence light distribution.

This invention is made | formed in view of such a situation. It is an object of the present invention to provide a headlamp for a vehicle that can improve the assembling of a luminaire in a vehicle headlamp configured to move the movable shade to change the light distribution of the luminaire and to increase the positional accuracy of the movable shade relative to the light source.

1 is a side sectional view showing a headlamp for a vehicle according to an embodiment of the present invention.

FIG. 2 is a detailed view of portion II of FIG. 1. FIG.

3 is a cross-sectional view seen in the direction of the arrow III of FIG.

4 is a view like FIG. 1 showing a first modification of the above embodiment.

FIG. 5 is a view similar to FIG. 1 showing a second modification of the embodiment; FIG.

<Explanation of symbols for main parts of drawing>

10: headlights for vehicles

16: reflector unit

18: discharge valve

18a: discharge light emitting part (light source)

20: reflector

20A: Central part

20B: Peripheral (Remaining)

20a: reflective surface

20b: after normal opening

20c: boss

20d: shade fixing seat

20e: end

22: movable shade

22A: Shade Body

22B: Stay

22a: long hole

24: shade driving device

26; Valve support base

26a: support bracket

26b: protrusion

26c: flange

28: fixed shade

28A: shade body

28B: Stay

30: sun spring

32: displacement regulation block

34: solenoid

36: movable iron core

38: return spring

40: E ring

42: shaft member

44: pin

46: displacement regulating spring

48: annular spacer

A: axis of rotation

Ax: optical axis

The present invention achieves the above object by using a predetermined valve support base.

That is, the vehicle headlight according to the present invention,

A light source and a reflector for reflecting light from the light source forward, a movable shade capable of shielding a part of the light incident from the light source and the at least two shielding shades of the movable shade having different values for the incident light; In a headlamp for a vehicle comprising a shade driving device for moving between positions,

A light source valve having the light source is fixedly supported to the reflector through a valve support base for fixedly supporting the light source valve,

The movable shade and the shade driving device are attached to the valve support base.

The kind of the "light source" is not particularly limited, and may be, for example, a discharge light emitting unit of a discharge valve, or a filament of an incandescent valve such as a halogen valve.

The above-mentioned "moving shade" is not specifically limited as long as it can shield a part of incident light from a light source valve to a reflector.

The "at least two positions where the shielding amount of incident light is a different value" may be only two positions or three or more positions, and the movable shade is positioned at the position to form a low beam distribution pattern or a high beam distribution pattern. It may be included or may not be included.

The "shade drive device" is not limited to a specific drive device as long as it is configured to move the movable shade between the at least two positions. For example, the use of a solenoid, a use of a pulse motor, and the like can be employed. Moreover, the form of "movement" of the movable shade by this shade drive device is not particularly limited, for example, rotation, linear reciprocating motion, or the like can be adopted.

The above "valve support base" is not particularly limited as long as the light source valve is fixedly supported and configured to be fixedly supported by the reflector while the movable shade and the shade driving device are attached thereto.

As shown in the above configuration, the vehicle headlamp according to the present invention includes a shade driving device for moving a movable shade capable of shielding a part of the light incident from the light source to the reflector between at least two positions where the shielding amount of the incident light is different. Although the light source valve having the light source is fixedly supported to the reflector through the valve support base, and the movable shade and the shade drive device are attached to the valve support base, the light source valve, the movable shade and the shade drive device are provided. It can be handled integrally as a unit together with the support base. Therefore, when this unit is assembled in advance and attached to the reflector, the luminaire assembly can be easily performed, and the positional accuracy of the movable shade with respect to the light source can be improved.

As described above, according to the present invention, the assembling of the luminaire can be improved in the headlamp for a vehicle configured to move the movable shade to change the luminescence light distribution, and the positional accuracy of the movable shade with respect to the light source can be improved.

Although the specific structure of the said valve support base is not specifically limited as mentioned above, When this is comprised by the die-cast molded article excellent in dimensional precision and intensity | strength, the positional accuracy of the movable shade with respect to a light source can be heightened further.

Further, in the above configuration, when the fixed shade covering the movable shade is provided near the front of the movable shade, the movable shade and its surrounding structure can be made difficult to be seen from outside the luminaire, and at that time, the fixed shade is applied to the valve support base. The fixed support can improve the luminaire assembly.

In the above configuration, a part of the reflector may be formed by being separated from the rest of the reflector, and a part of the reflector may be integrally formed with the valve support base. In this case, the valve support base is attached to the remaining part of the reflector. Since a large area can be fixedly supported, the positional accuracy of a luminaire optical system can be improved by this.

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described using drawing.

1 is a side sectional view showing a headlamp for a vehicle according to one embodiment of the present invention, FIG. 2 is a detailed view of part II of FIG. 1, and FIG. 3 is a sectional view seen in the direction of the arrow III thereof.

As shown in FIG. 1, the vehicle headlamp 10 according to the present embodiment is arranged in an up and down direction through an aming mechanism not shown by the reflector unit 16 in a back chamber formed of the lens 12 and the lamp body 14. It is installed to be able to move inclined in the left-right direction.

The reflector unit 16 includes a discharge valve (metal halide valve) 18, a reflector 20, a movable shade 22, a shade drive device 24, a valve support base 26, and a fixed shade 28. ).

The lens 12 is provided with a light distribution control function to the reflector unit 16 as a transparent lens. That is, the reflector 20 has a reflecting surface 20a which reflects light forward from the discharge light emitting portion 18a (light source) of the discharge valve 18, and has a diffused or deflected reflecting function of the reflecting surface 20a. Thus, the beam forming the predetermined light distribution pattern is irradiated to the front.

The discharge valve 18 is fixedly supported by the reflector 20 via the valve support base 26. In other words, the valve support base 26 is formed of a die-cast molded article, and the bosses 20c are provided on a plurality of portions of the rear surface of the reflector 20 in a state of being inserted from the rear of the reflector 20 into the rear top opening 20b. Screwed). The discharge valve 18 is fixedly supported on the valve support base 26 by the sun spring 30. At that time, the position of the discharge light emitting portion 18a of the discharge valve 18 is determined on the optical axis Ax of the reflector 20.

The movable shade 22 has a cylindrical shade main body 22A formed in a concave-convex shape with a trailing edge, and a plate-shaped stay 22B extending slightly rearwards downward from the lower end of the shade main body 22A. The rivet is fixed.

The movable shade 22 can take the low beam configuration position shown in FIG. 2A and the high beam configuration position shown in FIG. 2B by the shade drive device 24. And this movable shade 22 is a part of the light which injects into the reflecting surface 20a of the reflector 20 from the discharge light emission part 18a of the discharge valve 18 by the shade main body 22A in a low beam structure position. Shields the light from the low beam beam to the reflective surface 20a while reducing the shielding amount of incident light to the reflective surface 20a by the shade body 22A at the high beam configuration position. The amount of light required to irradiate at is secured.

The shade drive device 24 includes a solenoid 34 screwed to the valve support base 26 below the optical axis Ax of the reflector 20, and the movable iron core 36 of the solenoid 34. And a return spring 38 for pressing the movable iron core 36 toward the non-excited position.

The movable iron core 36 is equipped with an E-ring 40 which contacts the front end of the return spring 38 to receive the elastic pressing force of the return spring 38 at the middle thereof, and the front and rear ends thereof. It is formed in a branched shape.

The movable shade 22 extends in the lateral direction through the shaft member 42 to the support bracket 26a formed to protrude forward from the valve support base 26 in the middle portion of the stay 22B. ) Is rotatably supported. Moreover, the annular spacer 48 is attached between the stay 22B and the support bracket part 26a, and the generation | occurrence | production of the shaking part of the connection part of the stay 22B and the shaft member 42 is minimized by this. .

In addition, the movable shade 22 is connected to the distal end of the movable iron core 36 via the pin 44 at the lower end of the stay 22B. This connection is fixed to the front end of the movable iron core 36 by penetrating the pin 44 from side to side in a state where the front end of the stay 22B is inserted from both left and right sides at the two-headed end of the movable iron core 36. This is done by doing. A long hole 22a through which the pin 44 is inserted is formed in the tip end portion of the stay 22B so as to extend in the vertical direction. Accordingly, the shaft member 42 and the pin 44 along the rotation of the movable shade 22 are formed. It is designed to absorb the change in distance between

The protruding portion 26b protruding forward is formed in the vicinity of the proximal end of the support bracket 26a in the valve support base 26. The displacement regulating block 32 is screwed to the protrusion part 26b from the front through the displacement regulating spring 46. The displacement regulating block 32 is made of a member made of resin (for example, made of fluorine resin) which is hard to generate sound, and a V-shaped groove is formed from the front end face to the lower end face.

The beam switching between the low beam and the high beam by the shade drive device 24 is performed as follows.

That is, when the beam changeover switch (not shown) of the shade drive device 24 is off, the movable iron core 36 of the solenoid 34 is in the non-excited state, and therefore is movable by the elastic pressing force of the return spring 38. The iron core 36 moves forward, thus rotating rearward around the rotation axis A to a position where the stay 22B of the movable shade 22 contacts the front end face of the displacement regulating block 32. It is fixed to the low beam structure position shown to 2 (a). On the other hand, when the movable iron core 36 of the solenoid 34 is excited by the ON of the beam changeover switch, the movable iron core 36 moves backward, so that the stay 22B of the movable shade 22 is displaced. It rotates forward around the rotation axis A to the position which contacts the lower surface of 32, and is fixed to the high beam structure position shown in FIG.2 (b).

When the movable shade 22 is rotated to the low beam configuration position or the high beam configuration position, the end face 22b of the stay 22B contacts the bottom surface of the V-shaped groove, but at that time, both sides of the V-shaped groove The left and right displacement of the stay 22B is regulated by the wall surface, whereby the movable shade 22 is prevented from swinging in the front-rear direction or the left-right direction by vibration or the like during vehicle travel. Further, the displacement regulating spring 46 fitted to the front end of the projection 26b of the valve support base 26 is formed to extend substantially in a U shape along the lower surface of the projection 26b, and the movable shade 22 ) Is elastically deformed in contact with the end face 22b of the stay 22B when it is rotated to the high beam configuration position. This prevents the occurrence of unnecessary sounding during beam switching, and also swings the connection of the stay 22B and the shaft member 42 or the connection of the stay 22B and the movable iron core 36 of the solenoid 34. In addition, the movement of the movable iron core 36 itself is absorbed.

In the front vicinity of the movable shade 22, a fixed shade 28 covering the movable shade 22 is provided. The fixed shade 28 has a cap-shaped shade main body 28A formed in an elliptical shape having a longitudinal length, and a cross-shaped U-shaped stay 28B extending slightly rearward toward the lower side from the lower end of the shade main body 28A. Is integrally formed. The fixed shade 28 is screwed to the reflector 20 at the lower end of the stay 28B. A shade fixing seat 20d protrudes from the lower end of the reflecting surface 20a in the reflector 20.

As described above in detail, the vehicle headlamp 10 according to the present embodiment is a movable shade capable of shielding part of incident light from the discharge light emitting portion 18a of the discharge valve 18 to the reflecting surface 20a of the reflector 20. Although the shade driving device 24 is rotated between the two positions where the shielding amount against the incident light becomes a different value, the discharge valve 18 has the reflector 20 through the valve support base 26. And the movable shade 22 and the shade drive device 24 are attached to the valve support base 26 so that the light source valve 18, the movable shade 22 and the shade drive device 24 are fixed to the valve support base 26. It can be handled integrally as a unit together with the valve support base 26.

Therefore, if this unit is assembled beforehand and attached to the reflector 20, the luminaire assembly can be easily performed and the positional accuracy of the movable shade 22 with respect to the discharge light emitting part 18a can be improved.

In particular, in this embodiment, since the valve support base 26 is comprised from the die-cast molded article excellent in dimensional accuracy and intensity | strength, the positional precision of the movable shade 22 with respect to the discharge light emission part 18a can be heightened further. .

Moreover, in this embodiment, since the fixed shade 28 which covers the said movable shade 22 is provided in the front vicinity of the movable shade 22, the movable shade 22 and its peripheral structure (namely, the movable shade 22) are provided. ) And the support structure of the movable shade 22 and the movable iron core 36 of the solenoid 34) to the valve support base 26 can be made difficult to be seen from outside the luminaire.

Next, the modification of this embodiment is demonstrated.

4 is a view similar to FIG. 1 showing a first modification of the present embodiment.

As shown in the drawing, the fixing shade 28 is screwed to the lower end of the valve support base 26 instead of the reflector 20. In order to realize this, the stay 28B of the fixed shade 28 extends rearward. An end portion 20e is formed at the lower end portion of the reflector 20, and the end portion 20e supports the stay 28B from below.

By fixing the fixed shade 28 to the valve support base 26 as in the present modified example, even when the fixed shade 28 is provided, the luminaire assembly performance can be improved.

FIG. 5 is a view similar to FIG. 1 showing a second modified example of the present embodiment. FIG.

As shown, in the present modification, the central portion 20A (part of) near the optical axis Ax in the reflector 20 is formed separately from the peripheral part 20B (the remaining part) of the reflector 20. The center part 20A of the reflector 20 is integrally formed with the valve support base 26. And the valve support base 26 is provided in the some part of the back surface of the peripheral part 20B of the reflector 20 in the flange part 26c extended in the outer peripheral edge part of 20 A of center parts of the reflector 20. As shown in FIG. The screw is fixed to the boss 20c. Moreover, also in this modification, the fixed shade 28 is screwed and fixed to the lower end of the valve support base 26. As shown in FIG.

As in the present modification, the central portion 20A of the reflector 20 is separated from the peripheral portion 20B to be integrally formed with the valve supporting base 26, thereby widening the valve supporting base 26 with respect to the reflector 20. The area can be fixedly supported, thereby increasing the positional accuracy of the luminaire optical system. Moreover, also in this modification, since the fixed shade 28 is fixedly supported by the valve support base 26, the luminaire assembly property improvement in the case where the fixed shade 28 is provided can be aimed at.

As shown in the above configuration, the vehicle headlamp according to the present invention includes a shade driving device for moving a movable shade capable of shielding a part of the light incident from the light source to the reflector between at least two positions where the shielding amount of the incident light is different. Although the light source valve having the light source is fixedly supported to the reflector through the valve support base, and the movable shade and the shade drive device are attached to the valve support base, the light source valve, the movable shade and the shade drive device are provided. It can be handled integrally as a unit together with the support base. Therefore, when this unit is assembled in advance and attached to the reflector, the luminaire assembly can be easily performed, and the positional accuracy of the movable shade with respect to the light source can be improved.

As described above, according to the present invention, the assembling of the luminaire can be improved in the headlamp for a vehicle configured to move the movable shade to change the luminescence light distribution, and the positional accuracy of the movable shade with respect to the light source can be improved.

Claims (4)

A light source, a reflector for reflecting light from the light source forward, a movable shade capable of shielding a part of the light incident from the light source, and at least two of the movable shades having different shielding amounts for the incident light; In the headlamp for a vehicle comprising a shade driving device for moving between dog positions, A light source valve having the light source is fixedly supported to the reflector through a valve support base for fixedly supporting the light source valve, The movable headlight and the shade drive device are attached to the valve support base. The headlamp for a vehicle according to claim 1, wherein the valve support base is made of a die cast molded product. The fixed shade of Claim 1 or 2 which covers the said movable shade in the front vicinity of the said movable shade is provided, The fixed head of the vehicle headlight is fixed to the valve support base. A part of the reflector is formed separately from the rest of the reflector, A part of the reflector is integrally formed with the valve support base.